Noble gases are adsorbed on

Why does physisorption decrease with the increase of temperature?

Which one of the following statements is not correct?

Plot of $\log \left( \frac{x}{m} \right)$ against $\log P$ is a straight line inclined at an angle of $45^{\circ}$. When the pressure is $0.5 \ atm$ and Freundlich parameter $(K)$ is $10$,then the amount of solute adsorbed per gram of adsorbent is .......... $g$ $(\log 5 = 0.699)$.

Which one of the following statements is not correct?

Froth floatation process for the concentration of sulphide ores is an illustration of the practical application of